Automatic railroad-crossing gate



J. R; GOLDEN. AUTOMATIC RAILROAD CROSSING GATE APPLICATION FILED APR. 7,I919; 1 %3 2, Patented Dec. 12, 1922'...

ISHEETS-SHEET I.

In Wen 2'01;

J. R. GOLDEN.

AUTOMATIC RAILROAD CROSSING GATE.

APPLICATION FILED APR. 7, 1919.

Patented Dec.12,1922.

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' 1. R. GOLDEN. AUTOMATIC RAILROAD CROSSING GATE.

AFPLlC ATl ON FILED APR. 7, 1919- Patented Dec. 12, 1922.

- J. R. GOLDEN. AUTOMATIC RAILROAD CROSSING GATE.

APPLICATION FILED APR. 7, 1919- I Patented Dec. 12, 1922 N N R N Q110/37; R; aoldflw,

"O 11 1/ I Attorney.

J. R. GOLDEN. AUTOMATIC RAILROAD CROSSING GATE.

APPLICATION FILED APR. 7. I9I9.

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AUTOMATIC RAILROAD CROSSING GATE. APPLICATION FILED APR-7.1919.

1 43 22 Patented Dec 12, 1922..

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Patented llfiec. 12, 139122.

rarest JOHN R. e-onnnn, or HAMMOND, INDIANA.

AUTOMATIC snrLnoan-onossrns GATE.

Application filed April 7, 1919. serial No. 288,027.

To all whom it may concern j X Be it known that 1, JOHN R. GOLDEN, acitizen of thelUnited States, and a resident of the city of Hammond,county 01" Lake, and State of Indiana, have inventedcert'ain new anduseful Improvements in Automatic Railroad-Crossing Gates, of which thefollowing is a specification. 1

My invention relates to improvements in automatic railroad crossinggates and has for its object the provision of a device which willautomatically lower the gates at a railroad crossing upon the approachofa train thereto, and automatically raise the same after the trainpassed. Another object is the provision of a railroad crossing gate,electrically connected with a device, upon the passing over or which bya-train the gate will be lowered as. thetraiu approaches the crossing,and raised after the train has passed the crossing. 1

Other objects will appear hereinafter.

The invention consists in the combinations and arrangements of partshereinafter de scribed and claimed.

The invention will be best understood by reference to the accompanyingdrawings forming a part of this, specification, and in which, i

is a side elevation of the gate- Fig. 2,

mechanism,

operating tig. 3,

operating mechanism, j i

Fig. 4, is a rear elevation of the gateopcrating mechanism,

Fig; 5,. is a side elevation. of an exhaust valve, v j s Fig; 6, s alongitudinal sectionalview of the exhaust valve,

View of the circuit Fig. 12, isa sectional view of the valve taken online 12-12 of Fig. 1,

Fig. 13, is a sectional view of the valve taken on line 13-13 of Fig.1,i

Fig. 1 1, is a sectional. view of Fig. 8 taken on line 14L14 of Fig. 1,

Fig. 1, is a top planviewofthedevice applied,

isa .front elevation o1 the gate- Fig. 15, is a top plan viewof theelectrical device, with thehousing top removed,

Fig. 16,:is a side elevation'of one electrical removed, 1 j Fig.17, is asectionta-ken on line 17-47 stin -Ad Fig. 18, is a sectional view takenon line devicewith the wallof the housing and parts 18--18 of Fig. 16,and

Fig. 19, is a sectional view taken on line .1919 of Fig. 16.

In the operation of the device, there isstationed, in close proximity tothe. railroad crossinggate, an electrically operated mechanism which inturn operates an airpressure mechanism for raising r lowering the gate.

stationed along the railroad track, on both sidesof the gate, areelectrical devices,which are adapted to break and close an electriccircuit uponthe passing oi a train along the track at the point wherethese devicesare stationed.

The preferred form of construction, as illustrated in the draw ngs,comprisesfla housing19 enclosinga shaft 20 mounted on suitahle'bearings20, and 20" secured to the base of housing 19, one end of saidshaitprojecting "through one side of said housing.

Secured tothe end of the shaft which pro jects through the housing 19 isan upright arm 21 adjacent to and projecting shove the rail 22, so thata wheel, in passing along said rail, will strike the arm 21 and oscilate it. At the opposite endfofsaid shaft, enclosed within thehousing,issecured a perpendicw larly extending arm 23 having a horizontallyprojecting portion 24. Fivctally secured to lugs 25, projecting from thebase oi? said housing, adjacent to and opposite the arm 23, is afour-blade knife switch, having thehlades 27 connectedv attheir upperend by an insulating memher 28 from the center of which upwardlyprojects aninsulating stud 29 which loosely engages in a slot 30 in themember 24L, so that upon the rocking of the member 24 in eitherdirection'the blades 27 will be carried in thesame direction.

Pivotally mounted in the housing 19. in lugs arising from metallicmembers 31 32, 33, 34,'35 and 36", respectively,are con- "tact elements,also metallic, 31, 3 1, and 36, so positioned thatupon the rocking otthe blades 27 in'one direction, three of said hlade-s will come intocontact with and he cnga, ed by elements 31, and 33, and

upon roc zing the hlades'27 in the other diarise from an insulatingmember 35'. which covers the base of. hous'ing'l9. Interposed betweenthe tails 3 1 and the lug bearing a member which co-operates with thepart from which the member 31 projects, are

positioned, coil springs .34. (lo-operating with the studs 32 are nuts33. which. serve to retain the members 31 in their position on saidstuds 32. As will be described later on, the blades 27, 'being rockedtoeither side, are sometimes so. rocked with great force and rapidity.Uponbeing-rocked to either side, the blades, in engaging with theelements 31, 32 and 33, and 34, 35 and 36v would come into contact withthese elements with great force. Were these elements rigidly fastened,in a short time, the blades rocking-against said elements wouldthemselves, in a short time, become distorted or worn out, or wouldcause these elements to become distorted, loosened or worn out.Consequently, these elements are pivotally mounted. and haveshock-absorbing-elements in the nature of spiral springs 34", whichserveto assure a connection of allthe blades with their correspondingelements upon a rocking motion, and which serve also to take up the 1shock naturally incident to these blades coming into contact with theirco-' operating elements, as will be readily understood. j

; Mounted on saidshaft 20, intermediatethe ends thereof, isahorizontally extending bar 37; having flanges 38 and SS onl oppositeends. Projecting through a slot in each of said flanges are posts 39 and39 secured to the insulating member which covers the base ofthe housing19 and threaded at their upper end. These posts have a nut 40 whichco-operates with their threaded end, and a washer 41', Interposedbetween saidfiange and said washer, on said posts 39 "and 39, are-spiralsprings 42, of equal tension. It is thus seenthat upon pressing one endof the member 37 downwardly, the spiral ten sion at'the opposite end ofthis member will tend to restore the member 37 to its horizbntalposition, Secured to each end of member 37,,adjacent the axis thereof,are metallic spring contact members 43, as clearly seen in Fig. 15.llclounted in the housing 19,011 opposite sides of the shaft andadjacentthe members 43, are magnetic coils an insulated member 45 beingdisposed on shaft 20 between the coils and bearing terminals 46.Terminal posts also arise from the members 31., 32, 33, 34, 35 and 36.

Stationed near the railroad crossing, mounted on a fran'ie 47, is amotor 48 having a pinion or gear wheel 49 secured to the outer end ofits shaft. 7 The gear 49 meshes with the gear wheel 50, which is mountedon a shaft 51 supported in suitable bearings 52 on frame 47. The outerend of shaftbl bears a pinion or gear wheel 53, 'which meshes with agear wheel 54 mounted on a shaft 55, supported in asuitable bearing 56.

i an eccentric: wheel 61 bearing the customary eccentric strap 62 andeccentric bar 63.

lligidly mounted to the base of the member which formsthe bearings 59,by means. ot upright bars 64, isa switch-board 64 on which is mounted aknife blade switch. each of the blades of said switch being mountedpivotally, intermediate their ends on lugs 65v which project from saidswitchboard. The upper ends of said knife blades are connected by aninsulating ane'mber,

from. the center of which projects an insulated handle 66 having a slot67 in which operates a bolt loosely connectingthe arm (33 to the member66- The arm 68 projects irom. a transverse bar 69 to which is secured,at one end, an arm 70 to which is pivotally connected eccentric bar. 63.The bar 69. is mounted transversely at the upper end of theswitch-board, in suitable bearingssecured to saidswitch-board. Thearrange: ment of these parts is such that upon rotation of the wheel 60,the eccentric ,bar moved vertically up, and down.

The connection of the .eccentricbar with the knife blade switch is suchthat upon the upward motion of endear the lmver ends of thebladescontact withterminal; elements and serve to close a switch. Uponthe dowi ward. movement of saidbar, the. contact of the lower'endsof'said blades is broken and a connection is formed between the upperends of said blades and terminal elements, thereby closing a switch atthe upper ends of said blades. Secured to the outer face of theeccentric wheel, or made integral there with, is a disc 71, so;positioned on said eccentric as to be concentric with the shaft 58.Eccentrically connected to said disc 71. at one end thereof, by apivotal connection, is a bar 72 pivotally connected at its opposite endto an arn '73 projecting laterallyffron a valve as clearly showniii.Fij1 ,,Q-.

The val re 74-, which is tapering or conical.

shaped, as clearly seen in Fig. 10, is provided with posts 7 5 andprojecting from opposite ends. The post 7 5 which projects from thetapered end of the valve is threaded on its outer end. The valve seatsin a housing 76, communicating with the interior of which is a feed pipe7 7 and delivery pipes 78 and 79, as clearly shown 1n Figs. 3 and 11. Anexhaust pipe 80 is connected with the feed pipe 77.

Secured to the shaft 51, opposite the end to which. wheel 50 is secured,is a disc 81 to which is eccentrically pivotally mounted a piston rod82, secured to which is a piston 83 which is mounted in a cylinder ofone of the usual types of air pumps. Feed pipe 77 communicates with theinterior of this cylinder, and when the pump is in operation, suppliesair under pressure to the valve housing and the valve, as will bereadily understood. The valve '74 is retained in position in the housing76 by means of a coil spring 84 positioned loosely on post 7 5 i andinterposed between the housing 76 and a washer which is retained inposition on the outer end of post 75 by a co-operating nut, as clearlyshown in Fig. 3. As is ap parent. the tension of the coil spring isincreased or diminished upon the turning of said nut either on or oil.Provided on the outer surface of valve 74 is an l -shaped groove 85, onopposite sides of which are openings 86 and 87 which pass through thevalve.

Stationed in close proximity to the valve 74: and its co-operating partsis crossing gate 88, at the base of which is arranged suitable apparatusfor raising and lowering said gate through the medium or compressed air.In this apparatus are two cylinders 89 and 89, one adapted to co-operatein lowering said gate and the other adapted to co-opcrate in raising thesame. From the arrangement of the various elements thus tar described,it is apparent that upon the starting of" the motor 48, the wheel 50will he caused to rotate and the piston 83 will he set in motion,forcing air through the feed pipe 77 and into the valve 74. Thearrangement of the groove is such that when the stem 01" the L-shapedgroove is aligned or registers with the mouth of the delivery pipe 78,the base or short portion of the L-shaped groove will be aligned orregister with the mouth of the feed pipe 77 so that the air forcedthrough the feed pipe 7'7 will pass into the valve housing, along theL-shaped groove on the valve and out of the valve easing into deliverypipe 78. which conducts the air to the cylinder 89 of the gate raisingapparatus. This will result in lowering the gate and forcing the pistonin cylinder 89 up. The air in the cylinder 80 will consequently beforced back through delivery pipe 79, but at the time the air beingforced through delivery pipe 78, as

already described, the opening 8? registers .ing the air, which isforced back through the delivery pipe, free passage to escape. Thisoperation takes place when the motor 48 is started while the eccentricrod 63 is in the position shown in Fig. 9. In other words, while thecircuit is closed with the lower ends 01 the knife blades which. arepivoted to members 65, the air delivered from the air pump serves tolower the cross ing gate. While this operation is taring place, that is,while the air pump in operation, the gear wheel 50 is rotated and thesegmental gear 5'7 is brought around to a position to mesh with the gearwheel 60, thereby rotating the same. This rotation of the wheel 60causes the eccentric bar 63 to move downwardly, breaking the connectionat the lower ends of the blades of the switch and closing the circuit bymeans of the upper end of the blades of the switch. t the same time, thebar 72 is moved backward, thereby moving the groove 85 from alignmentwith the mouth ot the delivery pipe 78, and consequently closing thevalve at the mouth of the delivery pipe 78. The gear 57 is of suchlengthas to rotate the gear (it) one-half of a revolution. -The valve 74; isthen in such a position that the mouth of the feed pipe 77 is aligned orregisters with the elongated portion of the l.-shaped groove, and themouth of the delivery pipe 79 is also aligned orregisters with the sameportion of this: groove. Upon the'starting of the motor T8, the air issimilarly delivered through the feed pipe into the valve housing. andout through the pipe 79 into the cylinder 89 of the gate-raisingapparatus. This will, force the piston in cylinder 89 up, with theconsequent raising of the gate 88, at the same time forcing the pistonof the cylintlerfifl. down, thereby forcing the air in cylinder 89 backthrough delivery pipe 78. The valve; in being turned as itl'lOv'Cdescribed, will cause the opening 86 in the valve to register with themouth of the delivery pipe '7 9. At this position, registering with theopening 86 in the valve is an opening in the housing, thereby atl'ordingfree passage out of the valve housing to the air which is forced backthrough the delivery pipe 7 9. In the operation described above, thegear wheel makes another revolution actuating the gear wheel 60, therebymoving the valve '74 to its original position and also breaking thecircuit formed by the upper end of the blades of the switch and gates 80are normally in a raised position.

T o the exhaust pipe 80 is secured a valve housing 90, in which isseated a tapering conical shaped valve 91. Projecting from opposite endsof said valve are posts, one of which is threaded and adapted to receivea nut 92 and washer 92, as clearly seen in Figs. 5 and 6. The nut 92being threaded on the valve, the latter is secured in the housing underthe tension of the coil spring. To the opposite side of said valve issecured a discor drum 93 having two upwardly projecting shoulders 94 and.94. Positioned adjacent the lower end of housing 90, secured to exhaustpipe 80, is a collar 95 having an outwardly projecting arm 95 to whichis secured, atone end, a Spiral spring 95", the opposite end of saidspring being secured to a stud 95" eccentrically positioned on the outerface of drumv 93. On the housing is positioned a stop adapted to engagewith shoulder 94. Secured to the shaft 55 is a collar 96 having ashoulder 97 a which is inclined at one end and which is adapted, uponthe rotation'of said collar 96, to comeinto contact with a circuitbreaker 113, to be described hereafter, which is mounted on andinsulated from the bearing 56. Mounted on the shaft :55 is also a collar99, having a shoulder 99 adapted, upon the rotation of the shaft 55, toengage with the shoulder 9i and thereby turn the valve 91 in the housing90. Passing through the valve 90 is an open- .ing 101 adapted toregister, upon the turnmg of said valve, with openings102 and 102, whichcommunicate respectively with the outside air and the interior ofexhaust pipe 80. It is thus seen, that upon rotation of the shaft 55,the valve 91 is turned so as to allow the air in the tube 80 to escape.

lVhen the collar 99 is rotated sufiiciently to disengage shoulder 99from shoulder 94, the spring 95" will serve to restore the valve to itsformer or closed position.

Shoulder 95 serves as a stop by engaging with shoulder 94. when thespring95 re-. stores the valve to its closed position. The shoulder 99is so positioned on the shaft 55 that upon rotation of the wheel 5 1,thee);- haust valve 91 is opened to allow the escape of the airremaining in the air pump cylinder and in the pipes 77 and80, to escapeat the same time that valve 74 is operated by the eccentric rod 63. Itis thus seen that the movements are all synchronous relatively to eachother.

In Fig. 2 the shoulder 99' is shown as having just been freed fromengagement with the shoulder 9a, and the valve is shown in a closedcondition, having been restored to its closed or normal condition by thecoil spring 95.

Secured to the bearing 56 is a make and break device 113 embodying ametal spring element 109 which is secured in position at one end by athreaded bolt 110 which passes through an insulating member 114 andcontacts withthe terminal post, as shown in Fig. 7. The element 1.09contacts, at its option of the wheel 54. the member 97 comes intocontact with member 98 and thereby forces the member 11]. outwardly.This member 111 carries with it a member 109, and consequently breaksthe connection which exists between the two terminal poles, as shown inFig. 7. As isclearly seen in Fig. 1, the wire 103 connects with each ofthese terminal poles, each of said poles be- 111g. inter JOSGCl in the;wire 103 between the switch and the motor. Consequently, upon thepressing outward, of the member 109 from engagement or contact with thebolt which is opposite and corresponds to the bolt 110, thecircuit'connecting the motor is broken.

As shown in Fi 15 the contacts 34;;in

the opposite housings 19 arev connected by a wire 103; the contacts 36are connected by a wire 103"; the contacts31 are connected by a wire103; and the contacts 33 are connected by a Wire 103 Theblades of theswitches between the contacts'31" and I 3 1 in the respective housingsare connected bya wire 104?; and the blades of the switches between thecontactsl33 and 36 inthe respective housings are connected by a wire 101 The wire 103i is connected to-an outside terminalpost on thelower endof the switch-board (341 by a wire 103 and the wire 103 is connected tothe opposite outside terminal of the switchboard 6-1- by a wire 103.

\Vire 103 is connected to an outside terminal post on the upper end ofthe switch board 641 by a wire 103 and the wire 103. is connected to theopposite outside terminal, post on the upper end of the switchboard 64bya wire 103. The intermediate outside terminals of the switchboard 6 1are connected by a wire 103 in which wire is interposed the motor 48with its operative parts. The wires 10% and 10 i 'are connectedto asuitable source of energy such as a city supply by wires 103 and 104;respectively.

The magnets 44: are connected in series by wires 105, 106, 107, and 108,the wire being connected toan inner terminal on the an inner terminal onthe, upper end of the incense lower endoi. theswitchboard 64- hy a wire106 and the wire 1.05 being an inner terminal post on the lowerend ofthe switch-hoard 64; by a wire 105?. The wire 10'? is connected to aninner terminal on the upper end of the switch-hoardt l bywire 107, andthe wire 108 is connected to switch-boarded by wire 108. A battery 1.15is connected to the two-inner terminals intermediate the ends of 64- bywires 105 and 106 When the arm 21. in the switch-boxshown to theright'in Fig. 15 0f the drawings is oscillated in an anti-clocl. wisedirection hy'a nov'ing train, the switch blades in the switch-hoard St-are in engagement with the terminals on the lower'end oil? such switcihoard. The movement of lishes a circuit beginning at the supply wire 103and extendingthrough wire 104", to the innermost blade of the switch 24,through contact 34:,wires 103, mil wire 103 and motor, 103lOSHcontactfiGf, wire 10 1 and out through wire 10%; Simultaneouslywiththe establishment of themotor circuit, a circuit is establishedthrough the appropriate magnets 44 as follows,--;-from the battery 115throughwires 106*; 1062 106, contact 35" to magnets; returning through105, 105 105*;tobattry115. In this manner the bar 37 is held downagainst the tension of the springstLQ thereby securing the switch in thehousing- 19 in such aposition as to maintain the closed circuits alreadymentioned. "The motor haviiig been set in operationthrough this method,will continue to operate until the member 9? comes into engagement withthe members 111 and 98, when the circuit connected with said motor willbe broken.v This operation takes 'ei'r ect before the gear 57 comes intoon gate in-a lowered position, with the switch a which is mounted on thetrains eifcloseifl through the upper ends ofthe kniitehlades. l i 'henthe arm 21 in the opposite housing 19 is oscillated in an anti-clockwisedirection the motor circuit is established as follows oeginning at wire103, 'througlrltl lfi to switch, to contact 31, through103 108 103 103,103 contact 323% 104: and out at 10 1 and the magnet circuit isestablished through wires 105" 107 107 contact 32',to

connected to oscillated, therehy I througlhthe motor 48.

the switch-board being energized, thls arm will he retained arm 21estalogoing 111,

ing from the spirit of.thednventioni tor for operating magnets, backthrough wires 108 108 106", to battery 115.

'llhe motor havingheen set n operation, the machinery Wlll co-operate inthe previous operation, with the result "that the gate 88 Will heraisedand the different elements will he restored'to their norin?!position which is shown in F 2L it is thusseen that upon the passing ofa train along the rail 22', the arm 21-will be closing the circuit Themagnetic coils in its downwardly moved position until the circuitthroughthe magnetic coils is broken by means of the cooperatingmachinery which is mounted on i'raine 4. seen that the train in passingalong the rail and strikingthe arm 21, will lower the The nextelectrical device with which the train comes into contact-is stationedat the lit is also opposite sideoi the gate, and thearm 21a isoscillated in an opposite direction relatively to theco-operating parts,which are secured in the hous ng 19;. Th s w ll result in again closingthecircuit and operating the machinery to raise the gate as already"described; It is thus S3611 that there is provided in this device,automatio'means for lowering a gate-at a rallroad'crossing upon theapproach of aftraiin and automatic means for raising the gate after thetram has passed the crossing.

It is also clear that this device is ada pted to raise andlower the gatedescribed; ir-

respective of which direction the train is so that the device may heusedon a :louhle-track railroad as well as on a-singletrack railroad. oicourse th'e electricaldevices would have to be stationed at o jpositesides ottlle "railroad track at pointson opposite sides of the gataaswill be readily understood.

I While I have illustratedand dcscrihedtho preferred form ofconstruction i'or carrying my invention into etliect, this iscapable ofvariation and modification without depart- T L r I ,c 7 therefore do notIVlSll to be limited to the precise details of construction set:tort'lnhiit desire to avail myself of such Variations andmodificationsas come within the scope 'otthe appended claims,

Having described my invention wilt-at I claim asnew and desire tosecnrehy Letters Patent isr 1, A. railroad crossing gate operated bycompressed. air mechanism; anelectric mo D said compressed" airmechanism; means spaced. along tl'lGTftllroad track for automaticallysetting said In a douhle-track railroad motor in operation; gearsoperable by said I motor; a cannon one of said gears for auto asdescribed. a j 2, In combinatlon'wlth a rallro'ad crossmaticallystopping said motor, s1 lostantially ing gate adapted to be lowered andraised by compressed air mechanlsm, an electrlc .motor adaptedto operatesaid compressed air mechanism; electrical devices stationed along thel'QlllOdCl'tlfiClCOll opposite sldes of said gate;an electric circuitconnectingv each of sald elements with said motor;

7 gears operable by said motor; a cam on one of said gears for stoppingsaid motor; and a. switchoperable by a segment on one of said gears forpartly re-establishing said circuits. V

3. Incombination with a railroad crossing', gate adapted to be loweredand raised by compressed air mechanism, an electric motor adapted tooperate said compressed air mechanism; electrical devices stationedalong the railroad track on opposite sides of .vices adapted to beclosed by said rockerv said gate;an electric circuit connecting each ofsaiddevices with said motor; a rocker arm mounted in each of saiddevices; resilient contacts connected to each of said dearm; and gearson; said motor for'automatically breaking said circuit, substantially asdescribed. V I I,

l 4. Incombinationwith a railroadfcrossinggate, adapted to be loweredand raised by compressed air mechanism, an electric motor adapted tooperate said com-pressed air. mechanism electrical devices v stationedalong the railroad track on opposite sides of said gate; an electriccircuit connecting said devices with said motor; contacts connected .oneach of said devices for closing said circuit; an upwardly projectingarm adjacent the rail of said railroad track and adapted, upon thepassing of a train over said rail at said point, to operate said circuitcontacts;

and; gears on said motor for-automatically breaking said circuit,substantially as .de-

' scribed.

5; In combination with'a railroadcrossinggate adapted to be lowered andraised by compressed air mechanism, an electric motor adapted to operatesaid compressed air mechanism; electrical devices stationed along therailroad track on opposite sides of said gate, comprising a knifebladeswitch and magnets; an ,electriclcircuit connecting said switch andsaid motor; a rocker arm in each of said electrical devices adaptedtoclose the switches therein; a transverse bar secured to said rocker armand. adapted to engage said magnets to hold. said switch closed; andgears on said motor adapted to release said rocker arm and break saidcircuits v g 6. In combinationv with a railroadcross- 'ing gate adaptedtobe lowered and raised I by compressed air mechanism, an electric motoradapted to operate said compressed air mechanism; an electric'circuitconnecting with said motor; a switch interposed in said circmt: atpoints on oppositesides of said gate; an eccentric-gear operable by saidmotor for opening and closing said switch; and a camoperable-by saidmotor for breaking said circuit, substantially as described.

7. In combination with a railroad crossing gate adapted to be loweredand raised by compressed air mechanism, an electric motor adapted tooperate said compressed air mechanism; an electric circuitconnecting-withsaid motor; a switch interposed in said circuit [atpointson opposite sides of said gate; an arm connected with said switchand'adapted, upon the passing of a train along the rail at said point,to close said switch; a bar on said armand movable therewith means forretaining said switch in closed position; and a cam operable by saidmotor for breakingsaid circuit, substantially as described. 7

.8. In combination with a railroad crossing gate adapted to be loweredand raised by compressed air mechanism, an electric motor adapted to.operate said compressed air mechanism; an electric circuit connectingwith said motor; a switch interposed in said clrcuit at POHltS' onopposite sides of said gate; a rocker arm connected wlth said switch,and adapted, upon the passingqof a train along the railatsaid point, toclose said switch; a bar secured to said'arm and movable therewith;magnets adapted, when energized, to retain said bar in closed position;and a camoperable by said motor for breaking said circuit, substantiallyas described. I

9. In combination with a railroad cross inggate adapted tobe lowered andraised by compressed air mechanism,-anelectric motor; means connectedwith said motor and adapted, upon the operatlon of said 'motor, to raiseand lower said gate; an electric circuit connecting with saidmotor; aswitch interposed in said circuit at points on opposite sides ofsaidgate; a rocker arm connected with said switch and adapted,

:upon the passing of a train along the rail at said point to close saidswitch; a bar secured to said arm and movable therewith;

magnets engaging said bar for retaining said switch in. closed'position;and a cam valve and a switch,- substantially as. de-

scribed. v a v v y 1 n o bmat nrwith-a railr ademss 1 ,aeasee' ing gateadapted'to be lowered and raised motor; gears connected. with said motoradapted, in one position, to raise said gate and adapted, in anotherposition, to lower said gate; and gears on said motor for autoinatically regulating said gate raising means for alternatel lowerln andraisin said gate, substantially as descrlbed. i

12. In combination with a railroad cross ing gate adapted to be loweredand raised by compressed air mechanism, an electric motor; meansconnected with said motor for alternately lowering and raising saidgate; an electric circuit connecting with said motor; a switchinterposed in said circuit; a valve regulating the flow of air to saidcompressed air mechanism; and gears operable by said motor forautomatically and synchronously opening and closing said valve and foroperating said switch, substantlally as described. i

13. In combination with a railroad cross ing gate adapted to be loweredand raised by compressed air mechanis man electric motor; meansconnected with said motor for alternately lowering and raising saidgate;

an electric circuit connecting with said 1110 tor; a switch interposedin said circuit; a valve regulating the flow of air to said compressedair mechanism; a feed pipe communicating' with said valve;-an exhaustvalve communicating with said feed pipe; and eccentric gears on saidmotor for automatically operating said valves and said switchsynchronously, substantially as described;

In testimony whereofl have signed my name to this specification in thepresence of twosubscribing witnesses. JOHN B. GOLDEN, Witnesses: JOSHUAR. H. Po'r'rs,

HELEN F. LILLIs.

